元素录井技术在辽河太古宇潜山油藏中的应用

Application of Elemental Logging Technology in Archean Buried Hill Reservoirs of Liaohe Oilfield

摘要: 太古宇变质岩潜山内幕油藏的发现是辽河坳陷勘探的重大突破，在近几年辽河勘探的实践中，发现了多个变质岩潜山内幕油藏，但是随着勘探开发程度的不断深入，储量及产量接替成为制约该区发展的瓶颈。其原因是太古宇潜山风化壳难以识别、潜山内幕岩性复杂，导致对潜山油藏成藏机理的认识不足。通过运用元素录井技术，对兴–马太古宇潜山地质资料的分析，在潜山面的卡取、潜山风化壳的识别、潜山内幕岩性的认识上取得重要突破，进而提高了潜山风化壳的识别准确率，丰富了潜山内幕油气藏成藏的认识。

Abstract: The discovery of reservoirs in Archean metamorphic rock buried hill was a major breakthrough in the exploration of Liaohe depression. In recent years of exploration, many metamorphic buried hill reservoirs have been found, but with the ongoing exploration and development, finding the replacement reserves was increasingly difficult, which was a bottleneck restricting the development of the area. The reason was that the weathering crust of Archean buried hill was difficult to be identified, and the lithology of inner structure of buried hill was complex, which induced an insufficient understanding on the forming mechanism of buried hill reservoirs. By using the elemental logging technology and analysis of the geological data of Xing-Ma Archean buried hill, important breakthrough is made on the identification of the buried hill surface, recognition of weathering crust in buried hill, and understanding on the lithology inside the buried hill, therefore the accuracy of recognition of weathering crust is improved.